Wi-Fi Problem

I have an AlcatelOT 991 android phone. I am using Connectify and an USB MODEM so I can have wifi in my house without using a router. After i turn on the wifi on my android it detects the network but after some seconds it says not in range, everytime i restart the hotspot still the same problem. I tried factory reset, i tried to forget network, i tried to use mHotspot. i dont know what to do more, help me pls.
EDIT: it detects the wifi, then drops, then no signal, then reconnects, then not in range.. and so on(all this happens in some seconds)